Port the g.Tec driver to PyUSB 1.0

[tdy]

Hello, I've patched gtec.py to use the pyusb-1.0.0 API.

[okbalefthanded]

@tdy I'm having an issue with the gusbamp class, when running the amp.getdata() an exception of the type "Not ImplementedError" is raised, the method concerned is get_sample_frequency used by the Ampdecorator for getting marker, which is not implemented in the GUSBAmp, I also noticed that the configure method is also missing, by default at the init method the sampling frequency is set to 128 HZ.

If you're running into the same issue inform me, otherwise is everything is working fine please inform also.

[tdy]

@okbalefthanded I noticed the issue as well. For me, the same issue exists with the master branch. gtec.py can run as a standalone script, but from what I can tell, it was never fully implemented as a module.

In this branch, I've only translated the existing legacy code line by line into the 1.0.0 (stable) API. This involved updating the amp's USB initialization code and updating the controlMsg() and readBulk() signatures.

[okbalefthanded]

@tdy Thanks for your reply, I'll update my local code with your patch and try to complete the implementation if possible.